1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c3b3ab01f72b965ee5b1f4e953e39e731103fbba6eadbe5557d2a9bac512e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20ea838b-059d-47d1-b3ec-501b8f45c140.json and https://artists.proofprofile.net/proofs/artist/20ea838b-059d-47d1-b3ec-501b8f45c140.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tavern Melodies: Medieval Lute & Flute Dances of The Hobbits Vol. 1
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b958ce3eb8d1dd6a0a5f0170563a8007a0bf0a16310308d356646c0ce239c. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278006.
Picking up Berries – A Hobbit Dance for a Sunny Afternoon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f06daf6fe1e4d77c6b2db853207e95fc4cc697aec7b2b3bca80025de71cb1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278007.
A Hobbit Festival is Happening! (with Dancing and Ale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eba649946a5f7f29422da252de547e32fb68f2ecbb5a874b1f6293696b59ef. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278008.
But What About Second Breakfast? (at the Medieval Tavern)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b8af0d75feb76db5db04b7f245e20ac996768715d308c8d5882effce5b6d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278009.
End of the Day in Hobbiton (Time for Another Round at the Tavern)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3cdeee1c9a3e1b1bdf62fa16ddb339aea6b53b8ca51e90f1106b57de7948d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278010.
Candlelight Musings at the Medieval Tavern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28d97c2340b6cc58f278162017d339774d572913db1239b4823acd1a305163. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278014.
Medieval Dance of the Hobbits – Preparing for a Very Special Birthday!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf784ed4bf09858651b191cbe7358ff77933f70fb950b7a877fb2e7e943c730. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278016.
Hobbit Dance Around the Fire! (at the Medieval Market)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc8e3b7a7ce9d54fcfd418612269880d2c9f66d369fda14e5dbfe0c0584c6c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32278017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474a1db7f1b3bdb7e542c743a19a8bdae8666472f02fb49a62cdc7f641e6a39. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32326196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d3e729ae7b43369099529d9efa3169c9d72056049e36b9cbd596316519404f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32370505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0047c69dc16f619cf82d692ac1270a2a6f47687609904dab266f9a7499ea0e94. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32442350.
Tavern Melodies: Medieval Lute & Flute Dances of The Hobbits Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e61ee837e718ae3f926bce8ceb17f508671d64282a9e20d7f3f26c9b57338a7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32510856.